Rotary engine.



No. 694,294. Patented Fh. 25, |902.

v T. J. MASTERS.

RDTARY ENGINE.

plication 1edDec.4 19

(No nodal.) 2 sheets-sheet l.

v vPatented Feb. 25,v |902. T. .L MASTERS. RUTARY ENGINE.

(Application filed-Dec. 4, 1900.)

(No Model.)

2 Sheets-Shui 2.

lmrlw AF SQ r r UNITED STATES i PATENT @Trice THOMAS JAMES MASTERS, OF CARDIFF, ENGLAND.

ROTARY ENGINE,

SPECIFICATION forming part of Letters Patent No. 694,294, dated` February 25, 1902.

Application filed December 4,1900. Serial No. 38,662. (No inodxel.) I

To a/ZZ whom, it may concern:

Be it known that I, THOMAS JAMES MAS- TERS, collery proprietor, a subject of the Queen of Great Britain, residing at 29l St. Marys street, Cardin, lVales, England,have invented new and useful Improvements in Rotary Engines, of which the following is a specification.

My invention relates to an improved rotary engine having no moving parts except the revolving piston for controlling the admission and exhaust and for applying the pressure of the motive fluid to produce the rotation of the piston and its shaft. Y

The improved engine consists, essentially, of a revolving piston divided internally into a plurality of chambers each presenting a radially-disposed face to the pressure of the steam and each provided with a steam-admission port opening through the periphery of the piston, the admission-ports of adjacent chambers being alternately in different transverse planes and the piston being fitted to revolve steam-tight in a cylinder provided with circumferential steam-passages and a plurality of ports opening therefrom through the inner wall of the cylinder in such positions that theV admission-ports of the piston will coincide therewith at certain points during the revolution of the piston. Each chamber has also an exhaust-port opening through the end or side of the piston, the exhaust-ports coinciding at certain points in the revolution of the piston with corresponding exhaustports in the end or side cover ofthe cylinder, the number and disposition of the admission and exhaust ports relatively to each other and to the chambers being such that the steam will be admitted to more than half the numberof chambers at any one time, during which time it is being exhausted from the remaining chambers. The exhaust-ports might, however, be peripheral as well as the admissionports, or the admission-ports may be at the ends andthe exhaust-ports peripheral,or both admission and exhaust ports may be at the same or at opposite ends. Each steam-admission port of the cylinder maybe controlled by an independent adjustable valve, whereby the number of ports open or the extent to which they are opened may be regulated according to the work to be doneney the engine.

The improved rotary engine is illustrated in the accompanying drawings, forming part of this specification, wherein- Figures 1 and 2 are transverse sections' on lines l l 2 2, respectively, of Fig. 3, which is a longitudinal section of the engine on line 3 3, Fig. l. Fig. 4 is a similar section of the circumferential portion of the cylinder, the covers and piston being removed. Fig. 5 shows the piston separately.

The same letters of reference indicate the same parts in all the figures.

or, is the circumferential partof the cylinder, provided with steam-inlet b and a circumferential steam-passage or, preferably, two separate passages c, and from which pairs of ports (l open through the bore of the cylinder.

e is the piston, formed with a plurality of chambers f, preferably six or any other number, equally spaced angularly and each of the -form shown-that is to say, each extending the full width of the piston at the radiallydisposed forward side g of the chamber, the width of the chamber being gradually contracted toward the rear by the lateral walls of the chamber being contracted, as shown in dotted lines in Fig. 5, until the chamber is only of the width of the port next referred to. Each chamber f has a steam-admission port h, opening through the periphery and extending preferably through the entire length of the arc of the circumference of the chamber, the ports 7i being alternately in two vdifferent transverse planes of the piston corresponding to the planes in which the ports cl dare situate, so that by the revolution of the piston the ports h will coincide with one or other of said ports d, there being, preferably, for a piston having six chambers four sets of ports d, spaced at equal angular intervals around the bore of the cylinder.

The piston e is fitted to revolve steam-tight in the cylinder a and between the end covers t' thereof, the piston being keyed on a shaft mounted to revolve in stuffing-box bearings in the said covers. Each chamber f is provided with a segmental exhaust-port lo, opening through the end of the piston, and in the ICO adjacent end cover there are correspondingshaped exhaust-ports 7c, preferably four` in number, for a piston having six chambers, said ports being spaced at equal angular distances, as shown.

The number of chambersfin the piston may be more orless than six, and the rrlength of each port 7L may be less than the vrfull are occupied by the chamber f, while thevr nu mber' of admission and exhaust ports maybe greater orless than the numbers mentioned, provided that the opening and closing ofdthe admission to and of the exhaust from any one chamber and to and from'the SeVeralchambers in succession are timed so as/to produce a continuous revolution of the piston in lghe direction of the arrow, as bythe arrangement described and shown. ,f

In order rto make a steam-tight fit, springpressed packing-strips Z are fitted in transverse recesses in the bore of the cylinder at opposite sides of each set of ports d and are pressed into contact With the periphery ofthe icease/1 piston, similar spring-pressed packing-frames being fitted in the end cover of the cylinder around each of the exhaust-ports.

I claim-- The herein-described rotary engine, consisting or' a piston provided With a plurality of internal chambers such as shown and described, and with alternately-arranged peripheral admission-ports thereto tted to revolve Within a cylinder provided with circumferential passages and with ports opening therefrom through the bore of the cylinder with which peripheral ports of the piston coincide, the piston being also provided with end ports which are adapted to coincide with end ports in the cylinder at certain points in the revolution of the piston, substantially as specied.

THOMAS JAMES MASTERS.

Witnesses:

WILLIAM W. BLAKEMAN, THOMAS LLEWELYN EVANS. 

